Perhaps you should try some spelling variations:
trong doanh » trong nganh
tung doanh » dung doanh, nhung doanh, tung khoanh
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
cong vang » cong lang, cong quang, cong ngang
vang phan » van phan, nang phan, quang phan
ho chieu » theo chieu, mot chieu, doi chieu
phan lap » phan dau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (hoc thieu)) sach - thanh ((tung doanh) OR (trong doanh)) thong cong vang phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) sach - thanh ((tung doanh) OR (trong doanh)) thong cong vang phan lap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (hoc thieu)) sach - thanh ((tung doanh) OR (trong doanh)) thong cong vang phan lap".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc thieu)) sach - thanh ((tung doanh) OR (trong doanh)) thong cong vang phan lap*.